Fabrication of core‐shell structured TiC–Fe composite powders by fluidized bed chemical vapor deposition

2019 ◽  
Vol 102 (8) ◽  
pp. 4470-4479 ◽  
Author(s):  
Cheng Liu ◽  
Yafeng Yang ◽  
Pengpeng Lv ◽  
Junjie Guo ◽  
Maoqiao Xiang ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Fluidized Bed ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Core Shell ◽  
Composite Powders

scholarly journals Formation Process of the Integrated Core(Fe-6.5wt.%Si)@Shell(SiO2) Structure Obtained via Fluidized Bed Chemical Vapor Deposition

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 520
Author(s):  
Zhaoyang Wu ◽  
Chen Xian ◽  
Jixiang Jia ◽  
Xiangwei Liao ◽  
Hui Kong ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Fluidized Bed ◽  
Vapor Deposition ◽  
Formation Process ◽  
Deposition Time ◽  
Chemical Vapor ◽  
Core Shell ◽  
Sio2 Coating ◽  
Core Shell Structure ◽  
Shell Particles

As electromagnetic functional materials, soft magnetic composites (SMCs) have great potential for applications in high-energy electromagnetic conversion devices. The most effective way to optimize the performance of an SMC is to incorporate it into insulated ferromagnetic core-shell particles with high structural uniformity and integrity. Fluidized bed chemical vapor deposition (FBCVD) is a facile and efficient technique for the synthesis of ferromagnetic/SiO2 core-shell particles. However, the formation mechanism and conditions of integrated ferromagnetic/SiO2 core-shell structures during the FBCVD process are not fully understood. On this basis, the formation process and the deposition time required for transformation of the Fe-6.5wt.%Si substrate into the Fe-6.5wt.%Si/SiO2 composite, and finally into the Fe-6.5wt.%Si/SiO2 core-shell structure, were investigated. Deposition of the insulative SiO2 coating onto the Fe-6.5wt.%Si particles was described by the three-dimensional island nucleation theory. The SiO2 islands were initially concentrated in rough areas on the Fe-6.5wt.%Si particle substrates owing to the lower heterogeneous nucleation energy. Deposition for at least 960 s was necessary to obtain the integrated ferromagnetic/SiO2 core-shell structure. The uniformity, integrity, and thickness of the insulative SiO2 coating increased with the increasing deposition time. The results in this study may provide a foundation for future kinetics investigations and the application of FBCVD technology.

Al 2 O 3 hollow nanospheres prepared by fluidized bed chemical vapor deposition and further heat treatment

2019 ◽  
Vol 102 (11) ◽  
pp. 6463-6468 ◽  
Author(s):  
Jian Zhao ◽  
Malin Liu ◽  
Jiaxing Chang ◽  
Youlin Shao ◽  
Bing Liu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Chemical Vapor Deposition ◽  
Fluidized Bed ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Hollow Nanospheres

scholarly journals Aluminum coating by fluidized bed chemical vapor deposition on austenitic stainless steels AISI 304 and AISI 316

DYNA ◽  
2015 ◽  
Vol 82 (189) ◽  
pp. 22-29
Author(s):  
Jose Luddey Marulanda-Arevalo ◽  
Saul Castañeda-Quintana ◽  
Francisco Javier Perez-Trujillo
Keyword(s):  
Chemical Vapor Deposition ◽  
Fluidized Bed ◽  
Stainless Steels ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Austenitic Stainless Steels ◽  
Aluminum Coating ◽  
Aisi 304 ◽  
Aisi 316
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